以非週期性晶疇極化反轉鈮酸鋰晶體作為電光波長調變光參量產生器; Active Telecom-Band Wavelength tuning in Electro-Optic Aperiodically Poled Lithium Niobate Optical Parametric Generator

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题名:	以非週期性晶疇極化反轉鈮酸鋰晶體作為電光波長調變光參量產生器;Active Telecom-Band Wavelength tuning in Electro-Optic Aperiodically Poled Lithium Niobate Optical Parametric Generator
作者:	呂學璁;Hsueh-Tsung Lu
贡献者:	光電科學研究所
关键词:	電光波長調變;非週期性晶疇極化反轉鈮酸鋰晶體;光參量產生器;非線性光學;optical parametric generator;wavelength tuning;nonlinear optics;aperiodically poled lithium niobate;electro optic
日期:	2011-03-18
上传时间:	2011-06-04 15:54:12 (UTC+8)
出版者:	國立中央大學
摘要:	隨光通訊之發展，一個低成本且同時具備多訊號光輸出以及電光波長調變功能之雷射光源於高密度分波多工系統的應用為相當重要。於本研究中，設計一非週期性晶疇極化反轉鈮酸鋰晶體結構，藉以多個光參量產生機制，於通訊波段輸出多個雷射訊號，並構思兩種不同的非理想正、負晶疇長度比結構設計方式，以此對光參量產生機制之輸出訊號光進行電光波長調變。本元件於兩個訊號光（1540nm、1550nm）輸出以及三個訊號光（1510nm、1550nm、1605nm）輸出之設計結構的電光波長調變率最佳分別約可達0.38nm/(kV/mm)以及0.46nm/(kV/mm)，並經設計改良，其輸出訊號光間的相對功率則由平均31.64%提昇至86.55%，成功設計一單塊非串級式之多訊號光輸出且具電光波長可調的非線性積體雷射光源。 With the development of optical communication, a low-cost laser source which has both multi-wavelength output and the electro-optical (EO) wavelength tuning ability, for DWDM systems’ applications, is really significant. In this study, we designed, fabricated, and demonstrated an aperiodic poled lithium niobate(APPLN) structure that combined multiple optical parametric generator(OPG) to output multiple wavelength in the communications-band. And we also designed two methods to approach non-ideal domain length APPLN structure, making this chip having an electro-optical wavelength tuning ability in the OPG signal spectrum. With the EO APPLN designed by the nonideal domain length ratio technique, we can achieve a spectral tuning rate of ~0.38nm/(kV/mm) for 2-peak signals design and ~0.46nm/(kV/mm) for 3-peak signalsdesign. And with improved design, the relative signal output power is increased from an average of 31.64% to 86.55%. We have successfully achieved a non-cascade, multi-wavelength output in telecom band and tunable EO APPLN laser devices.
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